DC2 - Continuous DTC 1100: Check For MAF Intermittent Input

Continuous Memory DTC 1100 indicates the MAF sensor signal went below 2.55 gm/sec. (0.39 volts) or above 235 gm/sec. (4.70 volts) sometime during the last 40 warm-up cycles.

Possible Causes:
- MAF sensor connector with poor continuity.
- MAF harness with poor continuity.
- MAF harness intermittent short.
- MAF sensor internal intermittent open or short.

- Start engine and bring to idle.

NOTE: If a stabilized idle is not at least 700 rpm go to Symptom Flow Charts. Testing and Inspection

- Scan Tool connected.

- Run throttle up to 1500 rpm for 5 seconds, and bring back to idle.

- Access MAF PID for a fault indication while performing the following:
- Lightly tap on MAF sensor and wiggle harness connector to simulate road shock.

- Is the MAF PID changing below the minimum 2.55 gm/sec. (0.39 volt) or above a minimum 235 gm/sec. (4.70 volts)?

YES -- DISCONNECT and INSPECT the MAF sensor connector. If OK, REPLACE the MAF sensor. COMPLETE PCM reset to clear DTCs. Clearing Diagnostic Trouble Codes

Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes

NO -- Go to DC3. DC3 - Check MAF Harness to PCM For Intermittent Open or Short